Ludwig herz



(No Model.)

LHBRZ.

- T001. FORSQUARING MORTISBS. l No. 364,647. Patented June 14, 1887.

UNITED STATES PATENT OEEICEo LUDVHG HERZ, OF GMUND, BAVARIA, GERMANY.

TOOL FOR SQUARINGA NIORTISES.

SPECIFICATION forming part of Letters Patent No. 364,647, dated June 14,1887.

Application filed December 29, 1586. Serial No. 222,870. (No model.)

.To all whom it may concern: v

Be it known` that I, LUDWIG HERZ, a'citizen of Germany, residing atGmund, in the Kingdom of Bavaria, Germany, have invented a new anduseful Improvement in Tools for Squaring Mortises, of which thefollowing is a specication.

My invention relates to atool for making square holesin wood; and itconsists in the construction of the same, fully described in thefollowing specification. y

In the accompanying drawings, Figure l is a longitudinal section of theplane. Fig. 2 is a cross-section of the same on line'l 1, Fig; 3. Fig. 3is a cross-section on line 2 2, Fig. 3. Fig. 4 represents a longitudinalsection of a plane showing a modification, and Fig. 5 is a cross-sectionof the same.

Into the wooden block or roller A a round hole is first made,corresponding in size to the sides of the square of the required squarehole to be made into said block er roller, when the corners are planed,rst roughly formed by another tool before using the tool to which thisapplication relates; or the square hole may be planed out directly afterthe round hole has been madeby my improved tool at one operation.v Y

My improved tool consists of a head, e, ofaJ size corresponding to thediameterof the hole bored into the block A, to act as a guide, andattached to a rod, d, for operating the same. Some distance behind thehead e strips or bars g are attached to the rod d, upon which thecutters It are fastened. The cutters form a square of the desired sizeof the required hole, having their cutting-edges near the sides of thehead e. The shavings pass through the open space g between the bars g.On the head e cutters ff are arranged, placed square to each other onthe head, to cut the corners of the hole preparatory to the enteringofthe Glitters h. The cutters f f may bc dispensed with, as shown inFig. 6.

W'hat I claim is- The combination of rod d with head e, bars y',attached to the bar d, and cutters li, forming a square, the head ebeing attached to rod d in advance of the cutters, substantially as andfor the purpose described.

LUD WIG H ER Z.

Witnesses:

G. DEDREUX, A. ,MEICKMALH

